一类非自治微分积分方程的全局指数稳定性

2014-10-09 03:38黎定仕
关键词:时滞微分师范大学

马 超, 黎定仕

(西南交通大学数学学院,四川成都610031)

1 预备知识

微分积分方程稳定性的问题具有其特定的物理意义,许多学者对其进行了深入的探究[1-6].微分积分方程在多个科学领域中,如控制理论、生物、经济、医学等都会遇见,考虑其后效反应或者时滞状态[7-8]已经成为了必要.特别地,人们常常用微分积分方程来描述具有遗传性质的模型.而在这些领域中常见的时滞现象包括常数时滞和变量时滞[9-14],但是由于存在大量轴突大小和长度类似的路径,微分积分方程常常会有空间上的外延性.于是,会有沿着这些路径的传导速度和传播时滞的不同的现象产生.在这种情况下,信号的传播不再是瞬间的,也不能用离散时滞来模拟,从而就出现了一种更为合适的描述,即连续的分布式时滞.

本文研究如下非自治微分积分方程

2 主要结果

3 例子

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[3]Tian H J.The exponential asymptotic stability of singularly perturbed delay differential equations with a bounded lag[J].J Math Anal Appl,2002,270:143-149.

[4]龙述君.具有分布时滞的脉冲Cohen-Grossberg神经网络的指数稳定性[J].四川师范大学学报:自然科学版,2009,32(1):68-71.

[5]庄刘,龙述君.一类中立型随机泛函微分方程的稳定性分析[J].四川师范大学学报:自然科学版,2011,34(4):488-492.

[6]龙述君,张永新,向丽.具有混合时滞的随机细胞神经网络的稳定性分析[J].四川师范大学学报:自然科学版,2012,35(6):796-801.

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